[Elecraft] Baluns & wires & feeders (oh, my!)

[Karl Larsen]

    Hi Guys, if there are several who want to measure the two MFJ balum 
tuners loss on several bands, I can do it and will be glad to do it and 
report back. I will do it just like I did it when I measured MFJ tuner 
loss. You can see what I do by clicking on MFJ on my web page at:

       http://www.zianet.com/k5di/


73 Karl






wd4lst at windstream.net wrote:
> Great Idea - thanks for pointing me to the obvious <GR>. 
> Just as I was contriving a highly complex solution to a non existent problem!!
> Besides, one could always use another balun.
> 73s
> Pete
>   
>> From: Karl Larsen <k5di at zianet.com>
>> Date: 2006/10/07 Sat AM 07:07:13 CDT
>> To: Dave G4AON <elecraft at astromag.co.uk>
>> CC: elecraft at mailman.qth.net
>> Subject: Re: [Elecraft] Baluns & wires & feeders (oh, my!)
>>
>> Dave G4AON wrote:
>>     
>>> There is a simple way to measure the efficiency of a balun, make two of
>>> them and connect them "back to back". Measure the power fed to them and
>>> the corresponding output power. Obviously this doesn't take a mismatched
>>> antenna into account.
>>>   
>>>       
>>     I did just that about this 5 years ago. I used two MFJ tuners 
>> connected by the 4:1 baluns in each. I fed one from my MFJ Antenna 
>> Analyser and hooked a 50 ohm resister to the other tuner. I measured the 
>> voltage across the resistor with a RF probe.
>>
>>     Alas I can't locate the paper where I wrote down the results. Over 
>> the bands the loss was around 10-15% I recall and I thought that was 
>> about what I expected.
>>
>>
>> 73 Karl K5DI
>>
>> _______________________________________________
>> Elecraft mailing list
>> Post to: Elecraft at mailman.qth.net
>> You must be a subscriber to post to the list.
>> Subscriber Info (Addr. Change, sub, unsub etc.):
>>  http://mailman.qth.net/mailman/listinfo/elecraft    
>>
>> Help: http://mailman.qth.net/subscribers.htm
>> Elecraft web page: http://www.elecraft.com
>>
>>     
>
>
> Pete Axson
> WD4LST
> 17901 NE 18th Ave
> Citra, FL 32113
>
>
>
>